[FFmpeg-devel] [PATCH v2] tests/fate/ac3: Make ac3-fixed-encode-2 bitexact across, arches

[Andreas Rheinhardt <andreas.rheinhardt@outlook.com>]

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Updated version attached. Now only using six frames in order to avoid
triggering differences on aarch64.

- Andreas

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From 3b973c8bd47403348233a0b30fb03dfb0b7f5d75 Mon Sep 17 00:00:00 2001
From: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Date: Fri, 23 May 2025 11:42:38 +0200
Subject: [PATCH v2] tests/fate/ac3: Make ac3-fixed-encode-2 bitexact across
 arches

Don't use a 7.1 EAC3 input file for which our decoder is not
bitexact; instead just use the asynth-44100-8.wav file
which (as a 7.1 file) exhibits the same issue fixed by
1b3f4842c18409dba5a345ef9e7b3de7a4fa3657.
(Either the encoder or the resampler are still not completely
bitexact, so we limit the number of frames output.)

Also switch to a framecrc test so that the output channel layout
is directly contained in the ref file.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 tests/fate/ac3.mak                | 10 ++++++----
 tests/ref/fate/ac3-fixed-encode-2 | 13 +++++++++++++
 2 files changed, 19 insertions(+), 4 deletions(-)
 create mode 100644 tests/ref/fate/ac3-fixed-encode-2

diff --git a/tests/fate/ac3.mak b/tests/fate/ac3.mak
index b23a9e4dcc..e52678a2fd 100644
--- a/tests/fate/ac3.mak
+++ b/tests/fate/ac3.mak
@@ -91,10 +91,12 @@ fate-ac3-fixed-encode: CMD = md5 -i $(SRC) -c ac3_fixed -ab 128k -f ac3 -flags +
 fate-ac3-fixed-encode: CMP = oneline
 fate-ac3-fixed-encode: REF = e9d78bca187b4bbafc4512bcea8efd3e
 
-FATE_AC3-$(call ALLYES, EAC3_DEMUXER AC3_FIXED_ENCODER AC3_MUXER ARESAMPLE_FILTER) += fate-ac3-fixed-encode-2
-fate-ac3-fixed-encode-2: CMD = md5pipe -i $(TARGET_SAMPLES)/eac3/the_great_wall_7.1.eac3 -c:a ac3_fixed -ab 256k -f ac3 -flags +bitexact -af aresample
-fate-ac3-fixed-encode-2: CMP = oneline
-fate-ac3-fixed-encode-2: REF = 1b92b037b23b231c9523f334ccfb11da
+# This tests that the LFE does not get lost when converting the input 7.1
+# to a channel layout supported by the encoder.
+FATE_AC3-$(call FRAMECRC, WAV, PCM_S16LE, ARESAMPLE_FILTER AC3_FIXED_ENCODER) += fate-ac3-fixed-encode-2
+fate-ac3-fixed-encode-2: tests/data/asynth-44100-8.wav
+fate-ac3-fixed-encode-2: SRC = $(TARGET_PATH)/tests/data/asynth-44100-8.wav
+fate-ac3-fixed-encode-2: CMD = framecrc -i $(SRC) -c:a ac3_fixed -ab 256k -frames:a 6 -af aresample
 
 FATE_EAC3-$(call ALLYES, EAC3_DEMUXER EAC3_MUXER EAC3_CORE_BSF) += fate-eac3-core-bsf
 fate-eac3-core-bsf: CMD = md5pipe -i $(TARGET_SAMPLES)/eac3/the_great_wall_7.1.eac3 -c:a copy -bsf:a eac3_core -fflags +bitexact -f eac3
diff --git a/tests/ref/fate/ac3-fixed-encode-2 b/tests/ref/fate/ac3-fixed-encode-2
new file mode 100644
index 0000000000..8e945b6637
--- /dev/null
+++ b/tests/ref/fate/ac3-fixed-encode-2
@@ -0,0 +1,13 @@
+#tb 0: 1/44100
+#media_type 0: audio
+#codec_id 0: ac3
+#sample_rate 0: 44100
+#channel_layout_name 0: 5.1(side)
+0,       -256,       -256,     1536,     1114, 0x32fd276c
+0,       1280,       1280,     1536,     1116, 0x1ac63ba7
+0,       2816,       2816,     1536,     1114, 0xdde82dbc
+0,       4352,       4352,     1536,     1114, 0x39313179
+0,       5888,       5888,     1536,     1116, 0x166214e2
+0,       7424,       7424,     1536,     1114, 0xfbcc27ad
+0,       8960,       8960,     1536,     1114, 0xe7ed3321
+0,      10496,      10496,     1536,     1114, 0xa1823473
-- 
2.45.2


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